Dust collector of a grinding device

ABSTRACT

A dust collector of a grinding device includes an inner cover and an outer cover. The outer cover encloses the inner cover and is not extending to a whole periphery of the inner cover, but a notch is formed. The outer cover has a lower edge, and when the dust collector is installed to a grinding device, the inner cover is installed between a grinding disk of a grinding device and a body of the grinding device. The inner cover and the grinding disk define a first chamber. The outer cover enclosing the inner cover and the grinding disk; defining a second chamber with the inner cover and the grinding disk.

FIELD OF THE INVENTION

[0001] The present invention relates to a dust collector of a grinding device, wherein powders at the periphery of the bottom grinding surface of a grinding device can be well collected

BACKGROUND OF THE INVENTION

[0002] Referring to FIGS. 9 and 10, a prior art pneumatic grinding device 9 is illustrated. The grinding device has a grinding disk 91. The periphery of the grinding device 9 has a mask 92. The mask 92 is connected to the dust exhausting tube 93. The dust exhausting tube 93 is connected to a dust-absorbing device (not shown). The grinding disk 91 has a plurality of regular arranged holes penetrating through the grinding disk 91. The powders from the grinding tools of the grinding disk 91 will pass through the holes by the absorbing force of the dust-absorbing device. Then the powders are exhausted from the dust exhausting tube 93. Since the holes 94 of the grinding disk 91 is arranged regularly. The powders generated at the periphery of the grinding device (as indicated in arrow A) is difficult to enter into the holes 94 to cause that the powders can not enter into the dust-absorbing device but to accumulate on the surface of a work piece. No preferred grinding effect is formed. The accumulated powders causes that the grinding on the surface can not be viewed.

[0003] Furthermore, since the surface is accumulated with powders, the grinding devices move greatly. Not only the environment is polluted, but also the powders will be breathed by users. Therefore, a great damage occurs to the user.

SUMMARY OF THE INVENTION

[0004] Accordingly, the primary object of the present invention is to provide a dust collector of a grinding device, wherein the dust collector of a grinding device includes an inner cover and an outer cover. The outer cover has a lower edge, and when the dust collector is installed to a grinding device, the inner cover is installed between a grinding disk of a grinding device and a body of the grinding device. The inner cover and the grinding disk define a first chamber. The outer cover defines a second chamber with the inner cover and the grinding disk. The powders at the periphery of the bottom of the grinding disk may pass through these chambers to enter into the dust exhausting tube.

[0005] Another object of the present invention is to provide a dust collector of a grinding device, wherein the outer cover has a notch so that the operation of grinding may be viewed from the notch and then the position and other conditions of the grinding disk can be adjusted.

[0006] A further object of the present invention is to provide a dust collector of a grinding device, wherein the outer cover serves to prevent the powders from diffusing in the air so that secondary pollution is prevented, and moreover, the efficiency is improved. Besides, it is prevented that a user breathes the powders so as to hurt the body.

[0007] The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008]FIG. 1 is a perspective view of the present invention.

[0009]FIG. 2 is a partial cross sectional view of the present invention.

[0010]FIG. 3 is a cross sectional view along II-III of FIG. 1.

[0011]FIG. 4 is a cross sectional view long IV-IV of FIG. 1.

[0012]FIG. 5 is a cross sectional view along V-V of FIG. 1, wherein a second dust exhausting tube is illustrated.

[0013]FIG. 6 shows that the present invention is installed to a grinding device.

[0014]FIG. 7 shows that a connector is installed to grinding device with a dust collector of the present invention.

[0015]FIG. 8 shows that a connector is installed to grinding device with a dust collector of the present invention.

[0016]FIG. 9 is a perspective view of a prior grinding device.

[0017]FIG. 10 is a cross sectional view of a prior grinding device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Referring to FIGS. 1 to 8, the preferred embodiment of the present invention is illustrated. However, all disclosed in the description is only used to make those skilled in the art to fully understand the present invention, not to confine the scope of the present invention.

[0019] Referring to FIGS. 1 to 5, a dust collector of a grinding device of the present invention is illustrated. The dust collector 1 has an inner cover 11 and an outer cover 12 having an approximate round shape and being hollowed. In this embodiment, the outer cover 12 is integrally connected to the inner cover 11 and is enclosed around the inner cover 11. The outer cover 12 does not extend to be formed a circle, but a notch 23 is formed on the outer cover. The inner cover 11 is connected to a first dust exhausting tube 131.

[0020] The first dust exhausting tube 131 protrudes out of the outer cover 12. The outer cover 12 is connected to a second dust exhausting tube 132. After first dust exhausting tube 131 passes out of the outer cover 12, it is connected to the second dust exhausting tube 132 in parallel so as to be formed with a main dust exhausting tube 13.

[0021] The first dust exhausting tube 131 and second dust exhausting tube 132 may have other various arrangement ways. For example, after the first dust exhausting tube 131 passes out of the outer cover 12, it is enclosed by the second dust exhausting tube 132.

[0022] Referring to FIGS. 6 and 7, the present invention is installed to a pneumatic grinding machine 2. The grinding machine 2 has a body 21. The body 21 has a gas inlet tube 21, a gas exhausting tube 23, and a grinding disk 24 for grinding. The grinding disk 24 has a plurality of openings 241. The inner cover 11 of the dust collector 1 is installed between the grinding disk 24 and the body 21 and defines a first chamber 111. The outer cover 12 encloses the grinding disk 24 and defines a second chamber 121 with the grinding disk 24. In this the present invention, the grinding disk 24 extends downwards out of the outer cover 12 so that the lower edge of the outer cover 12 has an elevation difference ΔH. A proper elevation difference dose not affect the effect of dust-absorbing.

[0023] Referring to FIG. 7, the main dust exhausting tube 13 is connected to a connector 3. The connector 3 has a gas outlet tube 31 and a dust-absorbing tube 32. One end of the gas outlet tube 31 is connected to the gas exhausting tube 23 of the grinding device 2, while another end thereof is connected to a dust collecting bag (not shown). One end of the dust-absorbing tube 32 is connected to the main dust exhausting tube 13, while another end thereof is connected to the gas outlet tube 31.

[0024] Since the dust-absorbing tube 32 of the connector 3 is in communication to the gas outlet tube 31, while the gas outlet tube 31 is further connected to the dust collector. Therefore, when the waste gas from grinding is exhausted from the gas exhausting tube 23, by a siphon effect of the airflow of the gas outlet tube 31, the dusts at the peripheral of the grinding disk 24 is absorbed to the second chamber 121. Then the dusts pass through the second dust exhausting tube 132 and dust-absorbing tube 32 and then enter into the gas outlet tube 31 to the dust collecting bag.

[0025] When the grinding device 2 is actuated, the grinding disk 24 will grind the work piece contacted. The grinding powders near the opening 241 of the grinding disk will enter into the first chamber 111 from the opening 241 due to the absorbing force of the dust collector. Then the powders pass through the first dust exhausting tube 131, the dust-absorbing tube 32 of the connector 3, and the gas outlet tube 31 so as to be exhausted. The powders on the periphery of the grinding disk 24 will enter into the second chamber 131, and pass through the second dust exhausting tube 132, dust-absorbing tube 32, and the gas outlet tube 31 so as to be exhausted to the dust collecting bag.

[0026] In above description, by the dust connecting structure of the present invention, other than collecting through the opening 241, the powders from grinding at the periphery of the grinding disk 24 will be absorbed through the second chamber 121 due to the second chamber 121 defined by the outer cover 12 and the shielding effect of the outer cover 12, and therefore, the powders can be removed completely.

[0027] Besides, since the outer cover 12 does not extend to form a whole circle and has a notch 123. Therefore, when the grinding device 2 is operated, the operation of grinding may be viewed from the notch 123 and then the position and other conditions of the grinding disk 24 can be adjusted.

[0028] Moreover, when the dust collector 1 of the present invention is installed in the grinding device 2, since the outer cover 12 encloses the inner cover 11 and the grinding disk 24, the outer cover 12 serves to prevent the powders from diffusing in the air so that secondary pollution is prevented, and moreover, the efficiency is improved. Besides, it is prevented that a user absorbs the powders so as to hurt the body.

[0029] Of course, many modifications about the above embodiment are within the scope of the present invention. Referring to FIG. 8, the second embodiment of the present invention is illustrated. The grinding device 2 is installed with a connector 4. The connector 4 has a gas outlet tube 41 and a dust-absorbing tube 42. The dust-absorbing tube 42 has one end connected to the main dust exhausting tube 13, and another end thereof is connected to the gas outlet tube 41, but the gas outlet tube 41 is connected to a dust-absorbing device (not shown). The connector 4 is fixed to a grinding device 2 by the fixing portion 43. In this example, the dust exhausting tube 23 of the grinding device 2 is not communicated to the gas outlet tube 41 of the connector 4.

[0030] When the grinding device 2 is actuated, the working air entering into the body 21 of the grinding tool will vent out from the gas exhausting tube 23. The powders on the bottom and periphery of the grinding disk 24 will be absorbed to the first chamber 111 and the second chamber 121 by the absorbing force of the dust-absorbing device. Then, the powders pass through the main dust exhausting tube 13, dust-absorbing tube 42 and the gas outlet tube 41 to be absorbed into the dust collector.

[0031] The present invention are thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

What is claimed is:
 1. A dust collector of a grinding device includes an inner cover and an outer cover, the outer cover enclosing the inner cover and being not extending to a whole periphery of the inner cover, but a notch is formed; the outer cover having a lower edge, and when the dust collector being installed to a grinding device, the inner cover being installed between a grinding disk of the grinding device and a body of the grinding device; the inner cover and the grinding disk define a first chamber; the outer cover enclosing the inner cover and the grinding disk; and defining a second chamber with the inner cover and the grinding disk.
 2. The dust collector of a grinding device as claimed in claim 1, wherein the inner cover has a hollowed round shape.
 3. The dust collector of a grinding device as claimed in claim 1, wherein the inner cover is integrally connected to the outer cover.
 4. The dust collector of a grinding device as claimed in claim 1, wherein the grinding disk extends downwards out of the outer cover, so that the lower edge of the outer cover has an elevation difference with a bottom of the grinding disk.
 5. The dust collector of a grinding device as claimed in claim 1, wherein the inner cover is connected to a first dust exhausting tube and the outer cover is connected to a second dust exhausting tube, the first dust exhausting tube protrudes out of the outer cover.
 6. The dust collector of a grinding device as claimed in claim 4, wherein the first dust exhausting tube protrudes out of the outer cover and then is connected to the first dust exhausting tube, thereby, forming a main dust exhausting tube; and the main dust exhausting tube is connected to a connector.
 7. The dust collector of a grinding device as claimed in claim 5, wherein the connector has a gas outlet tube and a dust-absorbing tube; the gas outlet tube is connected to a gas exhausting tube of the grinding device; and one end of the dust-absorbing tube is connected to the main dust exhausting tube, while another end is connected to the gas outlet tube.
 8. The dust collector of a grinding device as claimed in claim 5, wherein the connector has a gas outlet tube and a dust-absorbing tube, one end of the dust-absorbing tube is connected to the main dust exhausting tube, and an exploded end thereof is connected to the gas outlet tube; the gas outlet tube is connected to a dust-absorbing device; and the connector is fixed to the grinding device through a retaining portion. 